One 8-inch round loaf bread
2 tablespoons extra-virgin olive oil
1 pound ground beef
1/3 pound ground pork
1 teaspoon salt
1/4 cup Thousand Island dressing
6 large iceberg lettuce leaves, sliced or torn
Preheat the broiler.
Slicing horizontally through the middle of the bread, cut out a 1/2-inch-thick layer and discard, reserving the top and bottom layers.
Brush the cut sides with 1 tablespoon olive oil; broil until golden.
In a large bowl, combine the beef and pork.
Mix in the remaining 1 tablespoon olive oil and the salt.
Place on a plate and shape into a ball; flatten into a 9-inch patty.
Preheat a large skillet over medium heat.
Transfer the burger to the skillet and cook until browned on the bottom, about 4 minutes.
Using a large spatula, flip the burger and cook 3 to 4 minutes more.
Spread the dressing on the toasted bread bottom and top.
Slide the burger onto the bread bottom; top with the lettuce leaves and the bread top.
Cut into wedges to serve.